Hello, you can't do that in Silverlight. You'll have to do that on the server. The simplest way to capture capture a screen shoot is using WPF's RenderTargetBitmap. You will of course need .NET 3.0 or above on the server. Then in your web service application,
you can use Process.Start method to start a WPF application. In the WPF application, you can write something like this:
DrawingVisual drawingVisual =
new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawVideo(player, new
Rect(new
Point(0, 0), new
Point(300, 300)));
drawingContext.Close();
RenderTargetBitmap rtb =
new RenderTargetBitmap(300, 300, 96, 96,
PixelFormats.Pbgra32);
rtb.Render(drawingVisual);
//Do whatever you want with this bitmap and then shutdown the WPF application.
player.Stop();
App.Current.Shutdown();
}
You can also try to use the WPF APIs directly in the web service application. But I haven't tested that.
shanaolanxing - I'll transfer to the Windows Azure team, and will have limited time to participate in the Silverlight forum. Apologize if I don't answer your questions in time.
It's easy, just use some screen recorder can help you
capture pictures from video. It can record whatever on your screen as video file, you just need to play the video on your computer screen, and it will help you record image of the video. And it also can help you save the image to standard format file.
Aaadi
Member
42 Points
35 Posts
How to capture a thumbnail image of a video?
Apr 14, 2008 06:35 AM | LINK
Hi,
How to capture a thumbnail image of a video in SilverLight 2 ?
Thanks
Silverligh 2 Bet
Software Engineer
Softech Worldwide LLC
Yi-Lun Luo -...
All-Star
25149 Points
2759 Posts
Microsoft
Re: How to capture a thumbnail image of a video?
Apr 16, 2008 05:02 AM | LINK
Hello, you can't do that in Silverlight. You'll have to do that on the server. The simplest way to capture capture a screen shoot is using WPF's RenderTargetBitmap. You will of course need .NET 3.0 or above on the server. Then in your web service application, you can use Process.Start method to start a WPF application. In the WPF application, you can write something like this:
private MediaPlayer player = new MediaPlayer();
private void Window_Loaded(object sender, RoutedEventArgs e){
VideoDrawing vd = new VideoDrawing();player.Open(
new Uri("expressionstudio.wmv", UriKind.Relative)); vd.Rect = new Rect(0, 0, 300, 300);vd.Player = player;
player.MediaOpened += new EventHandler(player_MediaOpened);player.Play();
//You may want to pass a parameter to the WPF application to indicate which frame you want to capture.
player.Position = TimeSpan.FromSeconds(30);}
void player_MediaOpened(object sender, EventArgs e){
DrawingVisual drawingVisual = new DrawingVisual(); DrawingContext drawingContext = drawingVisual.RenderOpen(); drawingContext.DrawVideo(player, new Rect(new Point(0, 0), new Point(300, 300)));drawingContext.Close();
RenderTargetBitmap rtb = new RenderTargetBitmap(300, 300, 96, 96, PixelFormats.Pbgra32);rtb.Render(drawingVisual);
//Do whatever you want with this bitmap and then shutdown the WPF application.
player.Stop();
App.Current.Shutdown();
}
You can also try to use the WPF APIs directly in the web service application. But I haven't tested that.
Zenuke
Member
50 Points
61 Posts
Re: How to capture a thumbnail image of a video?
Dec 20, 2008 11:15 PM | LINK
Is there any way to elaborate on this anymore or does anyone els ehave an incite?
Miyamoto
Member
90 Points
112 Posts
Re: Re: How to capture a thumbnail image of a video?
Dec 30, 2008 05:35 AM | LINK
Yi-Lun Luo --
Thanks very much. I'm using a web hosting service (DiscountASP.NET). Do you think this would work there?
Thanks for your help.
Daphne57
Member
4 Points
2 Posts
Re: How to capture a thumbnail image of a video?
Aug 24, 2011 06:06 AM | LINK
It's easy, just use some screen recorder can help you capture pictures from video. It can record whatever on your screen as video file, you just need to play the video on your computer screen, and it will help you record image of the video. And it also can help you save the image to standard format file.